revert accidental change

correct sign

Change the sequence of parameters for consistency.

Conversion of parameters from old drude term to new drude termwp_new = wp_old / sqrt(epsinf)
γ_new = λ_old * wp_old

- get number of periodic layers
- calculate size of xout and yout

1 to 1 correspondence of formulas to literature.

boson part to be done.

- do not multiply with ε∞ (Lambin version of ωp)
- correct the index for more than one layer
- extended Drude not tested yet.

Still linker errors.

tested and works.

clean and reorder

the usage of neps for the size of osc is wrong and gives a range check error.

also refactor implicit function zero in surlos.

remove common / mulayr / by
- replacing the calculation of epsmac by call of function epsilon
- move calculation of argmin and argmax to the function surlos. They are used there only.